Valve



Feb. 27, 1934. F10. RIEK 1,948,676

VALVE Filed Deo. 17, 1927 Patentedn Feb. 27, 1934 UNlTlazDA s'rA'ras 'PATENT osi-ica Application December 17, 1927 Serial No. 240,818

1 Claim.

This invention relates toa valve designed primarily for use in connection with compressors of the type forming a part of a domestic refrigerating unit. Y

. One of the objects of the invention is to provide a simple and eiective valve the parts of which vcan be readily assembled and do not require the use of springs, stems, separate centering means, or other structures tending to complicate and reduce the eiiiciency of the valve.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides inthe combination and arrangement of parts and in the details of construcll tion hereinafterdescribed and claimed, it being understood that changes in the precise embodiment ofthe invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawing, the'preferred forms of the invention have been shown. V In said drawing,

vFigure 1 is a transverse section through the valve casing showing the valve and its retaining l means in plan.

Figure 2 is a section on line 2-2, Figure 1. Figure 3 is a detail view of the valve. Figure 4 is a view similar to Figure 1 showing a slightly modified form of retainingmeans.

Figure 5 is a section on line 5-5, Figure 4.

Figure 6 is an enlarged section through a portion of the retaining means shown in Figure 5.

Referring to the figures by characters of reference l designates a portion of the valve casing *6 having a passage 2 opening into a counterbore 3, there being an annular rib within the counterbore extending around the passage and constituting-a.

valve seat. Formed in the wall of the counterbore 3'is an annular groove 5 rounded transversely as il shown. The wall of the counterbore between the groove 5 and the seat 4 is smooth so as to be en- @gaged slidably by the rounded corner portions of a substantially rectangular valve 6. This valvet is formed of a very thin flat plate of steel adapted normally to rest on the seat 4, the rounded corner portions of the valve serving to hold the straight side edges spaced from the wall of the' counterbore so that when the valve is unseated :duid can ilow ireely therearcund.

For the purpose ci retaining the valve in proper position relative to its seat a resilient spider 7 is seated detachably within the groove 5. This spider is formed ypreferably oi spring steel and,

in the structure illustrated in Figures 1 and 2, is

shaped to provide three inwardly bowed side portions 8. Two oi' these side portions are spaced apart at one end as shown at 9 while the other ends of these side portions are joined tothe other portion 8 by co. .necting portions 10. These connecting portions as well as the free end lportions N of the spider are designed to seat firmly in the groove 5 but by contracting the sides where thel ends 9 are normally spaced apart the entire spider can be contracted. Consequently by exerting a slight upward or downward pressure against the 5| spider while thus contracted, the same can be caused to spring into or out ofthe groove. The opposed parallel races of the spider are preferably slightly iiattened so that the thickness of the spider is slightly less than the width of the groove 7g 5 as will be seen by referring to Figures 2 and 6. Thus, the spider, when in its normal or'expanded position, will bind tightly against the central portion oil the wall of the groove 5 so that the spider cannot be unseated by pressure thereagainst. On the contrary the unseating of the spider can only be effected after said spider has been contracted as already explained.

With the spider in position the movement of the valve 6 is limited and While said valve Wi1l`llft au readily on of its seat, it will, when unseated, be heldat all times properly positioned relative to its seat so as to promptly and accurately return thereto. 'As the valve 6 is of very thin steel it will snugly :dt against its vseat to prevent leakage but t6 when it is unseated, undesirable buckling of the valve will be prevented because said valve will be backed by portions of the spider extending across that face thereof contacting therewith.

Instead of using a spider oi the type illustrated 20 in Figure l, a modiiied form such as illustrated in Figures 4 and 5 may be used. This spider is in the form of a ring l1 split at one side where it merges into parallel iingers 12 extending inwardly partly across the ring. In other respects the spider is of the same construction as the one already described. That is to say it has the slightly :dat faces whereby only the outer marginal portion of the ring will press against the wall of the groove in which the spider is seated. By 309 springing the` ilngers 12 toward each other the spider can Abe contracted eiiiciently to enable it to be forced into or pulled out of the 'groove 5. When the valve is unseated the ngers 12 will constitute, eilicient backing means therefor to prevent objectionable buckling or distortion of the valve. Y

What is claimed is:

The combination with a valvelcasing having a passage therein and a counterbore at one end bore and normally seated in the groove, said element constituting a backing for the valve when unseated, the thickness of the retaining element being less than the Width of the groove whereby said element, when seated in the groove, is held spaced from the marginal portions of the wall of the groove but in clamping engagement with the intermediate or peripheral portion of the wall of the groove.

i FOREST O. RJEK. 

